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How can I fix my Potterton Puma 80E?

We have a Potterton Puma 80E and until recently it has been working fine. The problem is that we have hot water on demand but it is over riding the heating so the heating won't come on?! Even when the shower is fully switched off it still drips hot water and is contsantly calling for hot water.

Please help.

Barry
February 2008
you must get the shower fixed as the boiler thinks that you want hot water all the time so the dhw flow switch in side of the boiler is made all the time stoping the diverter switching tom heating mode

chris hyde
February 2008
The question does not make any sense

john
February 2008
then you need to sort the dripping shower.

sonray heating
February 2008
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